Harrow



March 15, 193.. uBu s 2,110,984

HARROW Filed Dec. 30, 1936 3 Sheets-Sheet l Inventor Zea EBza riias,

Attorneys,

March 15, R S

LAI I A iiorneys March 15, 193. L. u. BURKES 2,110,984

' HARROW Filed Dec. 50, 1936 5 Sheets-Sheet 3 Inventor M n a Attomg ys Il|lll %Nliv M v m MN Patented Mar. 15, 1938 UNITED STATES PATENT OFFiCEHARROW Leo U. Burkes, Richton, Miss.

Application December 30, 1936, Serial No. 118,415

5 Claims.

Tlm's invention relates to soil conditioning and cultivating machinesand has reference in particular to what may well be called a convertibletype harrow, that is, one which may have its multiple spring teetharranged to function as a customary V-shapedstyle, or may have the teethobliquely angledwith respect to the line of draft to perform as aso-called side harrow.

structurally. Visualized and compared with prior. art harrowconstructions, it will be observed that the adopted harrow ischaracterized by a frame unit, a beam intersecting and adjustablyconnected to the central portion of the frame unit, bracing means forthe beam, and steering andmanipulating handles. for the walkingattendant, there being a plurality of spring teeth connected with anddragging behind said frame underneath of the handle.- This generalstructural arrangement is, of course, common to the trade and it is alsoa matter of common knowl-.

edge that quick detachable and adjustable spring teeth are provided forconversion results.

The essence of the present invention is reflected in the adoption anduse of a substantially rectangular frame unit provided with a pluralityof improved bodily adjustable clamps so constructed as to serve asstirrup-like hangers for the shank portions of the spring teeth, theclamps and frame unit being so constructed as to permit the teeth to bedisposed at direct right angles to the frame unit for individually orcollectively adjusting to assume substantially oblique angled positionwith respect to said frame unit.

Stated more specifically, the chief novelty resides in the provision ofa frame unit characterized by spaced parallel bar members having theirlower edges formed with keeper notches to selectively accommodatedistinguishably usable retention lugs on the block-like adapter formingpart of the clamping means, said adapter being saddled in the hangerstirrup or fixture which is, in turn, secured by set screw or the liketo associated retaining means cooperable with the bars of saidframeunit. 1

Although novelty is predicated on the notched bar construction of theframe unit as well as the stirrup-like hanger members, the specificnovelty in chief has to do with the multiple lug-equipped block-likeadapter which is in effect the holder for the shank portion of theassociated detachable spring tooth.

Other features and advantages will become more readily apparent from thefollowing description and drawings.

.. In the accompanying drawings wherein like (Cl. 5515 l) numerals areemployed to designate like parts throughout the various views:-

Figure 1 is a top plan view of the complete multiple purpose orconvertible barrow constructed in accordance with the principles of thepresent invention showing the old as well as the new features.

Figure 2 is a side elevational View of the rear end portion of thearrangement depicted in Figure 1 calculated to show to advantage thegeneral relationship of the horizontal beam with respect to the springteeth and improved holding means therefor.

Figure 3 is a bottom plan view of the ractangular frame unit showing thetwo distinguishable positions of the adapter blocks, the stirrupclamping means being omitted for clearness of illustration, one blockbeing disposed at right angles and the other at oblique angles.

Figure 4 is a top plan view of one end portion of Figure 3, that is, aview observing the right hand end portion of Figure 3 with certain ofthe other features omitted for clearness of illustration of parts.

Figure 5 is what may be called a full size view of one of the multiplelug-equipped adapter blocks or members.

Figure 6 is a section taken on the plane of the line 6--6 of Figure 1.

Figures 7, 8 and 9 are additional sectional 0 views, on an enlargedscale, taken on the planes of the lines l'l, 8-8 and 99, respectively,of Figure 1.

Reference is had first to the general assemblage depicted in Figure 1 ofthe drawings. Here the spring teeth are denoted by the numeral ill andhave downturned hooked ground-engaging ends l I as shown in Figure 2.This is, normally speaking, a five-tooth harrow and the forward ends orshank portions of the teeth Iii are adjustably clamped in holderscarried by the aforementioned rectangular frame unit 12. The numeral i3designates the brace while the numeral it indicates the beam to theforward end of which the source of propulsional power is connected. Thecustomary attendant-controlled handles 15 are shown at the rear. Theintermediate portion of the beam intersects the central portion of theframe unit l2 and is adjustably attached to the slotted extension orflange It as indicated at the point ll.

Reference being had now to Figure 3 it will be observed that the everimportant frame unit I2 is of general rectangular or longitudinallyelongated form and includes spaced paralleLsupporting bars or members 18having keeper notches l9 and 20 formed in the lower surfaces or edgesthereof and arranged in diagonal staggered relationship.

The adapter block is denoted by the numeral 2| and is of generalrectangular form. As shown to advantage in Figure 3 the bottom of theblock is formed with a channel 22 in which the shank of the tooth fitssliolably so that the tooth can be adjusted to position the hook ortooth element H toward or from the frame I2. It will be noticed inFigure 5 that one end, that is, the rear end of the block is indicatedby the numeral 23, while the diagonally out or oblique forward end isdifferentiated by the numeral 24. A pair of transverse spaced parallelstabilizing cleats '25 are provided on the attaching side of the block,one of the cleats being close to the rear end 23 and the other one atthe center of the block and both cleats being parallel to each other andparallel to said edge 23. Cooperable with these cleats are pairs of lugs25 extending at obtuse angles in relation to the transverse cleats 25.The effect of these two sets of lugs 26, which function as teeth, isthat said lugs are substantially oblique to the longitudinal dimensionof the block 2! as a unit. The numeral 21 designates supplementarycleats disposed parallel to each other and in parallelism with thecorrespondingly inclined or oblique edge 24. A group of three teeth orlugs 28 cooperate with these cleats 21. It follows that the teeth 26,that is, both sets, and the cleats 25 function simultaneously. These areused alternately with respect to the cleats 2'! and their associatedproperly angled teeth 28. The teeth or lugs 28 by the way aresubstantially straight with respect to the longitudinal dimension of theblock 21 The gist of the idea, however, is to be able to use theselected sets of teeth with respect to predetermined keeper notches 59and 20 in the bars l8 as shown in Figure 3 to get the desiredpredetermined angular position of the adapter block 2| with respect tosaid bars l8. For example, in Figure 3 at the right it will be noticedthat the teeth or lugs 26 are then engaged with the keeper notches l9and 20. This positions the edge 23 fiiush with the bars I8, disposes thecleats 25 in contact with the inner surfaces of the bars I8 as shown inFigure 4, and positions the block 2| as a unit, at right angles to thelongitudinal dimension of the frame unit l2. It follows that when theadapter block is in this position the shank portions of the teeth ID areat right angles to said frame unit l2. Then by shifting the block 2| theteeth 28 may be engaged with the notches l9 and 20 at which time theoblique edge 24 matches the bar l8, positioning said adapter block 2|diagonally and throwing the teeth ID in the same diagonal position withrespect to the frame unit l2.

Attention is now invited to the hanger fixtures for adapter block 21.Each fixture is the same in construction and is denoted by the numeral29 as shown to advantage in Figure 6. This fixture 29 is a frame theupper portion being fitted to embrace the suspension clip 39. This clip30 rests on the upper edges of the bars I9 and, therefore, suspends thehanger fixture 29 between the bars so that said hanger fixture is in aposition to, in turn, suspend the adapter block 2!. In fact, the adapterblock is saddled in a stirrup-like manner in the lower hanging portionof this clamping hanger 29. Attention is also called to the set screw3|- engaging the suspension clip or element 30. By tightening the screwthe clip 39 is clamped firmly down on the upper edges of the bars l8. Atthe same time it binds the selected lugs 26 or 28 in the keeper notchesl9- and 29. It also effectively binds the shank of the tooth in thechannel 22 thus providing the desired holder or clamping means for thetooth. It follows, therefore, that the holder comprises the adapterblock 2| adjustably connectible by its teeth 26 and 28 to the keepernotches l9 and 29 through the instrumentality of the set screw clampingmeans 29. By using the simple hanger clip or suspension element 30 andthe set screw 3| and frame hanger 29, the feature 29 can be axiallyadjusted in conjunction with the toothed block or adapter 2| tosatisfactorily obtain either of the two set positions shown in fulllines in Figure 3.

It follows that with this adjustable tooth clamping or holder means itis possible to proper: ly arrange the teeth ID to function either as theconventional V-shaped harrow or angled with respect to the line of draftto serve as a so-called side harrow.

Attentionis invited to Figure 2 wherein it will be observed that thenumeral 32 designates an arm adjustably mounted by a so-called rosetteclamp 33 on one end of the frame 12. This arm carries a blade 34 whichconstitutesa dirt shield located between two of the spring teethtofacilitate the operation of the teeth and to guard against easy breakageof these fragile spring teeth.

It is thought that the description taken inconnection with the drawingswill enable a clear understanding of the inventionto be had. Therefore,a more lengthy description is thought unnecessary.

While the preferred embodiment of the invention has been shown anddescribed, it is to be understood that minor changes coming within thefield of invention claimed may be resorted to if desired.

What is claimed is 1. In a structure assemblage of the class described,a frame unit including a pair of spaced parallel bar members, a clipresting on the upper edges of said members, a hanger stirrup embrac-ling and hung from said clip and located between said bar members, a setscrew adjusting and clamping connection between the clip and hangerstirrup, and adapter means in said hanger stirrup servingto slidablyreceive the shank portion of a cooperating spring harrow tooth.

2. In a structure of the class described, a relatively stationaryframeunit of general rectangular form including spaced parallel bar members,a stirrup-like hanger and clamping member disposed between said barmembers, a clip resting on the upper edges of thebar members,said-hanger member being attached thereto through the instrumentality ofa set screw, an adapter block saddled in said hanger member, saidadapter block being grooved to slidably accommodate the shank portion ofa cooperating spring harrow tooth, and co-acting elements between thelower edges of the bar members and adjacent surface of the adapter blockto permit said block to be arranged either at right angles or obliqueangles to properly position the harrow tooth as described.

3. In a structure of the class described, a frame unit including spacedparallel bar members having keeper notches formed in their lower edgeportions, an adapter block having selectively usable sets of teethengageable with the keeper notches, said adapter blockhavlng itsunderside grooved to slidably receive the shank portion of acomplemental harrow tooth, a hanger element embracing the adapter blockand located between the bar members of said frame unit, and means forclamping the hanger member firmly on said frame unit in the manner andfor the purposes described.

4. In a structure of the class described, a rectangular relativelystationary frame unit including spaced parallel bar members havingdiagonal keeper notches formed in their lower edges, an adapter block,said adapter block being provided with spaced sets of distinguishablelugs and said sets of lugs being selectively engageable with said keepernotches to permit the block to be disposed either at right angles to thelongitudinal dimension of the frame unit or in a position substantiallyoblique to said longitudinal dimension, and means for clamping theadapter block firmly in the notches, said means being cooperable withthe bar members of the frame unit.

5. As a new article of manufacture, a component part of an assemblage ofthe class described, comprising a frame unit including spaced parallelbar members having selectively usable keeper notches, an adapter unithaving selectively usable keeper lugs engageable with said notches toallow the unit to be connected with the frame in a position to disposeit at right angles or obliquely to the longitudinal dimension of saidframe, said adapter unit being grooved to accommodate the shank 'of aharrow tooth.

LEO U. BURKES.

